/**
* Copyright (C) 2003-2008 eXo Platform SAS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see<http://www.gnu.org/licenses/>.
*/
package org.etk.core.rest.impl.method;
import javax.ws.rs.core.MultivaluedMap;
import org.etk.core.rest.method.TypeProducer;
/**
* Abstraction for single (not for collections) types.
*
* @author <a href="mailto:andrew00x@gmail.com">Andrey Parfonov</a>
* @version $Id: $
*/
public abstract class BaseTypeProducer implements TypeProducer {
/**
* Create object from given string. In all extends for this class this method
* must be specified to produce object of required type. String will be used
* as parameter for constructor of object or static valueOf method.
*
* @param value string value
* @return newly created object
* @throws Exception if any error occurs
*/
protected abstract Object createValue(String value) throws Exception;
/**
* {@inheritDoc}
*/
public Object createValue(String param, MultivaluedMap<String, String> values, String defaultValue)
throws Exception {
String value = values.getFirst(param);
if (value != null)
return createValue(value);
else if (defaultValue != null)
return createValue(defaultValue);
return null;
}
}